常规使用的杀虫剂剂型及施药方法难以使药物接触靶标昆虫，而更多的是残留在环境中，其结果是造成较多的浪费，并污染环境，给人类健康造成危害。

It is difficult for conventional pesticides to contact target pests due to its formulations and administrating methods. The residual in the environment is harmful to people and pollutes environment.

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